drivers/media/pci/cx25821/cx25821-audio.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *  Driver for the Conexant CX25821 PCIe bridge
   4  *
   5  *  Copyright (C) 2009 Conexant Systems Inc.
   6  *  Authors  <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
   7  */
   8
   9 #ifndef __CX25821_AUDIO_H__
  10 #define __CX25821_AUDIO_H__
  11
  12 #define USE_RISC_NOOP           1
  13 #define LINES_PER_BUFFER        15
  14 #define AUDIO_LINE_SIZE         128
  15
  16 /* Number of buffer programs to use at once. */
  17 #define NUMBER_OF_PROGRAMS      8
  18
  19 /*
  20  * Max size of the RISC program for a buffer. - worst case is 2 writes per line
  21  * Space is also added for the 4 no-op instructions added on the end.
  22  */
  23 #ifndef USE_RISC_NOOP
  24 #define MAX_BUFFER_PROGRAM_SIZE                                         \
  25         (2 * LINES_PER_BUFFER * RISC_WRITE_INSTRUCTION_SIZE +           \
  26          RISC_WRITECR_INSTRUCTION_SIZE * 4)
  27 #endif
  28
  29 /* MAE 12 July 2005 Try to use NOOP RISC instruction instead */
  30 #ifdef USE_RISC_NOOP
  31 #define MAX_BUFFER_PROGRAM_SIZE                                         \
  32         (2 * LINES_PER_BUFFER * RISC_WRITE_INSTRUCTION_SIZE +           \
  33          RISC_NOOP_INSTRUCTION_SIZE * 4)
  34 #endif
  35
  36 /* Sizes of various instructions in bytes.  Used when adding instructions. */
  37 #define RISC_WRITE_INSTRUCTION_SIZE     12
  38 #define RISC_JUMP_INSTRUCTION_SIZE      12
  39 #define RISC_SKIP_INSTRUCTION_SIZE      4
  40 #define RISC_SYNC_INSTRUCTION_SIZE      4
  41 #define RISC_WRITECR_INSTRUCTION_SIZE   16
  42 #define RISC_NOOP_INSTRUCTION_SIZE      4
  43
  44 #define MAX_AUDIO_DMA_BUFFER_SIZE                                       \
  45         (MAX_BUFFER_PROGRAM_SIZE * NUMBER_OF_PROGRAMS +                 \
  46          RISC_SYNC_INSTRUCTION_SIZE)
  47
  48 #endif